Results 31 to 40 of about 2,741,856 (378)

Dispersal and migration

open access: yesAnimal Biodiversity and Conservation, 2004
Ringing of birds unveiled many aspects of avian migration and dispersal movements. However, there is even much more to be explored by the use of ringing and other marks. Dispersal is crucial in understanding the initial phase of migration in migrating birds as it is to understand patterns and processes of distribution and gene flow.
Schwarz, C. J., Bairlein, F.
openaire   +5 more sources

Tracer Dispersion in Rough Open Cracks [PDF]

open access: yes, 1998
Tracer dispersion is studied in an open crack where the two rough crack faces have been translated with respect to each other. The different dispersion regimes encountered in rough-wall Hele-Shaw cell are first introduced, and the geometric dispersion ...
Hulin, Jean-Pierre   +2 more
core   +1 more source

Urbanización y sistema de asentamientos en los países menos urbanizados de América Latina y El Caribe

open access: yesEstudios Geográficos, 2003
[es] Urbanización y sistema de asentamientos en los países menos urbanizados de América Latina y el Caribe. El objetivo prioritario de este artículo es analizar la distribución de la población, proceso de urbanización y sistema de asentamientos de los ...
Carmen Egea Jiménez   +1 more
doaj   +1 more source

REGULATION OF STRUCTURAL AND MECHANICAL PROPERTIES OF SHIITAKE MUSHROOM SUSPENSION AS AN OBJECT OF DRYING

open access: yesHarčova Nauka ì Tehnologìâ, 2021
The article considers whether a shiitake basidiomycete can be processed into powder. This mushroom is a source of valuable nutrients: it contains, on a dry basis, 18.76% of protein, 74.5% of carbohydrates, 1% of lipids, and 5.73% of ash.
T. Turchyna   +3 more
doaj   +1 more source

On the dispersion spectrum

open access: yesMonatshefte f�r Mathematik, 1991
For irrational \(\alpha\) the dispersion constant \(D(\alpha)\) is defined as \(\lim\sup_{N\to \infty} Nd_ N\) with \(d_ N=\sup_{x\in[0,1]}\min_{1\leq n\leq N}| x-\{n\alpha\}|\) with \(\{ x\}\) being the fractional part of \(x\). It was shown by \textit{H. Niederreiter} [Topics in Classical Number Theory, Colloq. Math. Soc.
Schnitzer, F.J., Kopetzky, H.G.
openaire   +3 more sources

Dispersive Estimates for Full Dispersion KP Equations [PDF]

open access: yesJournal of Mathematical Fluid Mechanics, 2021
AbstractWe prove several dispersive estimates for the linear part of the Full Dispersion Kadomtsev–Petviashvili introduced by David Lannes to overcome some shortcomings of the classical Kadomtsev–Petviashvili equations. The proof of these estimates combines the stationary phase method with sharp asymptotics on asymmetric Bessel functions, which may be ...
Didier Pilod   +3 more
openaire   +5 more sources

Natural layer silicate as a modifier for polymeric nanocomposites

open access: yesEngineering Structures and Technologies, 2010
In the building industry increasingly used for the manufacture of structural and finishing materials are silicate-containing nanocomposites, which include multi-functional modifiers, natural substances: mica, clay, zeolites, tripoli, etc.
Valerij Liopo   +3 more
doaj   +1 more source

Performance Evaluation of Different Rheometric Shearing Techniques to Disperse Concentrated Cement Suspension

open access: yesApplied Rheology, 2015
Build-up of cement-based suspensions is a complex phenomenon affected by the mixture concentration and testing parameters as well as the shear history. Accurate measurements of build-up rely on the efficiency of the applied pre-shear regime to achieve an
Mostafa Ahmed M., Yahia Ammar
doaj   +1 more source

Modeling of motor transport exhaust pollutant dispersion

open access: yesJournal of Environmental Engineering and Landscape Management, 2007
Pollution is a major problem in all countries, even developed ones. It is the major environmental negative impact of anthropogenic activities affecting ecology.
Petras Vaitiekūnas, Reda Banaitytė
doaj   +1 more source

Study on the dispersion of radon (222Rn) in geological objects in Bat Xat district, Lao Cai province, Northern Vietnam

open access: yesVietnam Journal of Science, Technology and Engineering, 2022
The Bat Xat district in the Lao Cai province of Vietnam has enormous potential for resources of copper and rare earth minerals. In fact, exploration and exploitation activities for these minerals have brought about positive economic benefits to this ...
Van Dung Nguyen   +4 more
doaj   +1 more source

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